com.sun.faces.facelets.impl.DefaultFaceletFactory Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jakarta.faces Show documentation
Show all versions of jakarta.faces Show documentation
EE4J Compatible Implementation for Jakarta Faces API
/*
* Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.faces.facelets.impl;
import static com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter.UseFaceletsID;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.regex.Pattern;
import com.sun.faces.RIConstants;
import com.sun.faces.config.WebConfiguration;
import com.sun.faces.context.FacesFileNotFoundException;
import com.sun.faces.facelets.compiler.Compiler;
import com.sun.faces.util.Cache;
import com.sun.faces.util.FacesLogger;
import com.sun.faces.util.Util;
import jakarta.el.ELException;
import jakarta.faces.FacesException;
import jakarta.faces.FactoryFinder;
import jakarta.faces.application.Application;
import jakarta.faces.component.UIComponent;
import jakarta.faces.context.ExternalContext;
import jakarta.faces.context.FacesContext;
import jakarta.faces.view.facelets.Facelet;
import jakarta.faces.view.facelets.FaceletCache;
import jakarta.faces.view.facelets.FaceletCacheFactory;
import jakarta.faces.view.facelets.FaceletException;
import jakarta.faces.view.facelets.FaceletHandler;
import jakarta.faces.view.facelets.ResourceResolver;
/**
* Default FaceletFactory implementation.
*
* @author Jacob Hookom
* @version $Id: DefaultFaceletFactory.java,v 1.10 2007/04/09 01:13:17 youngm Exp $
*/
public class DefaultFaceletFactory {
protected final static Logger log = FacesLogger.FACELETS_FACTORY.getLogger();
private Compiler compiler;
// We continue to use a ResourceResolver just in case someone
// provides a custom one. The DefaultResourceResolver simply uses
// the ResourceHandler to do its work.
private ResourceResolver resolver;
private URL baseUrl;
private long refreshPeriod;
private FaceletCache cache;
private ConcurrentMap> cachePerContract;
Cache idMappers;
// ------------------------------------------------------------ Constructors
public DefaultFaceletFactory() {
compiler = null;
resolver = null;
refreshPeriod = -1;
cache = null;
baseUrl = null;
}
public DefaultFaceletFactory(Compiler compiler, ResourceResolver resolver) throws IOException {
this(compiler, resolver, -1, null);
}
public DefaultFaceletFactory(Compiler compiler, ResourceResolver resolver, long refreshPeriod) {
this(compiler, resolver, refreshPeriod, null);
}
public DefaultFaceletFactory(Compiler compiler, ResourceResolver resolver, long refreshPeriod, FaceletCache cache) {
init(compiler, resolver, refreshPeriod, cache);
}
public final void init(Compiler compiler, ResourceResolver resolver, long refreshPeriod, FaceletCache cache) {
Util.notNull("compiler", compiler);
Util.notNull("resolver", resolver);
FacesContext facesContext = FacesContext.getCurrentInstance();
if (facesContext == null) {
throw new IllegalStateException("DefaultFaceletFactory cannot locate the faces context");
}
ExternalContext externalContext = facesContext.getExternalContext();
WebConfiguration config = WebConfiguration.getInstance(externalContext);
this.compiler = compiler;
cachePerContract = new ConcurrentHashMap<>();
this.resolver = resolver;
baseUrl = resolver.resolveUrl("/");
this.idMappers = config.isOptionEnabled(UseFaceletsID) ? null : new Cache<>(new IdMapperFactory());
// this.location = url;
refreshPeriod = refreshPeriod >= 0 ? refreshPeriod * 1000 : -1;
this.refreshPeriod = refreshPeriod;
if (log.isLoggable(Level.FINE)) {
log.log(Level.FINE, "Using ResourceResolver: {0}", resolver);
log.log(Level.FINE, "Using Refresh Period: {0}", refreshPeriod);
}
// We can cast to the FaceletCache here because we know
// that the Generics information is only used at compile time, and all cache
// implementations will be using instance factories provided by us and returning DefaultFacelet
this.cache = initCache(cache);
}
private FaceletCache initCache(FaceletCache cache) {
if (cache == null) {
FaceletCacheFactory cacheFactory = (FaceletCacheFactory) FactoryFinder.getFactory(FactoryFinder.FACELET_CACHE_FACTORY);
cache = cacheFactory.getFaceletCache();
}
// Create instance factories for the cache, so that the cache can
// create Facelets and Metadata Facelets
FaceletCache.MemberFactory faceletFactory = key -> createFacelet(key);
FaceletCache.MemberFactory metadataFaceletFactory = key -> createMetadataFacelet(key);
cache.setCacheFactories(faceletFactory, metadataFaceletFactory);
return cache;
}
/*
* (non-Javadoc)
*
* @see com.sun.facelets.FaceletFactory#getResourceResolver
*/
public ResourceResolver getResourceResolver() {
return resolver;
}
/*
* (non-Javadoc)
*
* @see com.sun.facelets.FaceletFactory#getFacelet(java.lang.String)
*/
public Facelet getFacelet(FacesContext context, String uri) throws IOException {
return this.getFacelet(context, resolveURL(uri));
}
public Facelet getMetadataFacelet(FacesContext context, String uri) throws IOException {
return this.getMetadataFacelet(context, resolveURL(uri));
}
/**
* Resolves a path based on the passed URL. If the path starts with '/', then resolve the path against
* {@link jakarta.faces.context.ExternalContext#getResource(java.lang.String)
* jakarta.faces.context.ExternalContext#getResource(java.lang.String)}. Otherwise create a new URL via
* {@link URL#URL(java.net.URL, java.lang.String) URL(URL, String)}.
*
* @param source base to resolve from
* @param path relative path to the source
*
* @return resolved URL
*
* @throws IOException
*/
public URL resolveURL(URL source, String path) throws IOException {
// PENDING(FCAPUTO): always go to the resolver to make resource libary contracts work with relative urls
if (path.startsWith("/")) {
URL url = resolver.resolveUrl(path);
if (url == null) {
throw new FacesFileNotFoundException(path + " Not Found in ExternalContext as a Resource");
}
return url;
} else {
return new URL(source, path);
}
}
/**
* Create a Facelet from the passed URL. This method checks if the cached Facelet needs to be refreshed before
* returning. If so, uses the passed URL to build a new instance;
*
* @param url source url
*
* @return Facelet instance
*
* @throws IOException
* @throws FaceletException
* @throws FacesException
* @throws ELException
*/
public Facelet getFacelet(FacesContext context, URL url) throws IOException {
Facelet result = getCache(context).getFacelet(url);
DefaultFacelet _facelet = null;
if (result instanceof DefaultFacelet) {
_facelet = (DefaultFacelet) result;
String docType = _facelet.getSavedDoctype();
if (null != docType) {
Util.saveDOCTYPEToFacesContextAttributes(docType);
}
String xmlDecl = _facelet.getSavedXMLDecl();
if (null != xmlDecl) {
Util.saveXMLDECLToFacesContextAttributes(xmlDecl);
}
}
return result;
}
public Facelet getMetadataFacelet(FacesContext context, URL url) throws IOException {
return getCache(context).getViewMetadataFacelet(url);
}
public boolean needsToBeRefreshed(URL url) {
if (!cache.isFaceletCached(url)) {
return true;
}
if (cachePerContract == null) {
return false;
}
// PENDING(FCAPUTO) not sure, if this is what we want.
for (FaceletCache faceletCache : cachePerContract.values()) {
if (!faceletCache.isFaceletCached(url)) {
return true;
}
}
return false;
}
private FaceletCache getCache(FacesContext context) {
List contracts = context.getResourceLibraryContracts();
if (!contracts.isEmpty()) {
StringBuilder builder = new StringBuilder();
for (int i = 0; i < contracts.size(); i++) {
builder.append(contracts.get(i));
if (i + 1 != contracts.size()) {
builder.append(",");
}
}
String contractsKey = builder.toString();
FaceletCache faceletCache = cachePerContract.get(contractsKey);
if (faceletCache == null) {
// PENDING(FCAPUTO) we don't support com.sun.faces.config.WebConfiguration.WebContextInitParameter#FaceletCache for
// contracts
faceletCache = initCache(null);
cachePerContract.putIfAbsent(contractsKey, faceletCache);
faceletCache = cachePerContract.get(contractsKey);
}
return faceletCache;
}
return cache;
}
private URL resolveURL(String uri) throws IOException {
// PENDING(FCAPUTO) Deactivated caching for resource library contracts. If we still want to cache it, we need a cache
// per contract libraries list.
// But the ResourceHandler caches on his own (using ResourceManager).
URL url = this.resolveURL(baseUrl, uri);
if (url == null) {
throw new IOException("'" + uri + "' not found.");
}
return url;
}
public UIComponent _createComponent(FacesContext context, String taglibURI, String tagName, Map attributes) {
// PENDING(FCAPUTO) does this work for resource library contracts? I think so.
UIComponent result = null;
Application app = context.getApplication();
ExternalContext extContext = context.getExternalContext();
File tmpDir = (File) extContext.getApplicationMap().get("jakarta.servlet.context.tempdir");
File tempFile = null;
OutputStreamWriter osw = null;
try {
// create a temporary file in that directory
tempFile = File.createTempFile("mojarra", ".tmp", tmpDir);
osw = new OutputStreamWriter(new FileOutputStream(tempFile), RIConstants.CHAR_ENCODING);
osw.append("");
osw.append("");
osw.append("");
osw.append(" attr : attributes.entrySet()) {
osw.append(attr.getKey()).append("=\"").append(attr.getValue().toString()).append("\"").append(" ");
}
}
String tempId = context.getViewRoot().createUniqueId(context, tagName);
osw.append(" id=\"").append(tempId).append("\" />");
osw.append("");
try {
osw.flush();
osw.close();
} catch (IOException ex) {
if (log.isLoggable(Level.FINEST)) {
log.log(Level.FINEST, "Flushing and closing stream", ex);
}
}
URL fabricatedFaceletPage = tempFile.toURI().toURL();
Facelet f = createFacelet(fabricatedFaceletPage);
UIComponent tmp = app.createComponent("jakarta.faces.NamingContainer");
tmp.setId(context.getViewRoot().createUniqueId());
f.apply(context, tmp);
result = tmp.findComponent(tempId);
tmp.getChildren().clear();
osw = null;
} catch (MalformedURLException mue) {
if (log.isLoggable(Level.FINEST)) {
log.log(Level.FINEST, "Invalid URL", mue);
}
} catch (IOException ioe) {
if (log.isLoggable(Level.FINEST)) {
log.log(Level.FINEST, "I/O error", ioe);
}
} finally {
if (null != osw) {
try {
osw.close();
} catch (IOException ioe) {
if (log.isLoggable(Level.FINEST)) {
log.log(Level.FINEST, "Closing stream", ioe);
}
}
}
if (null != tempFile) {
boolean successful = tempFile.delete();
if (!successful && log.isLoggable(Level.FINEST)) {
log.log(Level.FINEST, "Unable to delete temporary file.");
}
}
}
try {
byte[] faceletPage = "facelet".getBytes(RIConstants.CHAR_ENCODING);
ByteArrayInputStream bais = new ByteArrayInputStream(faceletPage);
} catch (UnsupportedEncodingException uee) {
if (log.isLoggable(Level.SEVERE)) {
log.log(Level.SEVERE, "Unsupported encoding when creating component for " + tagName + " in " + taglibURI, uee);
}
}
if (null != result) {
result.setId(null);
}
return result;
}
/**
* Uses the internal Compiler reference to build a Facelet given the passed URL.
*
* @param url source
*
* @return a Facelet instance
*
* @throws IOException
* @throws FaceletException
* @throws FacesException
* @throws ELException
*/
private DefaultFacelet createFacelet(URL url) throws IOException {
String escapedBaseURL = Pattern.quote(this.baseUrl.getFile());
String alias = '/' + url.getFile().replaceFirst(escapedBaseURL, "");
return createFacelet(url, alias);
}
private DefaultFacelet createFacelet(URL url, String alias) throws IOException {
if (log.isLoggable(Level.FINE)) {
log.fine("Creating Facelet for: " + url);
}
try {
FaceletHandler h = compiler.compile(url, alias);
return new DefaultFacelet(this, compiler.createExpressionFactory(), url, alias, h);
} catch (FileNotFoundException fnfe) {
throw new FileNotFoundException("Facelet " + alias + " not found at: " + url.toExternalForm());
}
}
private DefaultFacelet createMetadataFacelet(URL url) throws IOException {
if (log.isLoggable(Level.FINE)) {
log.fine("Creating Metadata Facelet for: " + url);
}
String escapedBaseURL = Pattern.quote(baseUrl.getFile());
String alias = '/' + url.getFile().replaceFirst(escapedBaseURL, "");
try {
FaceletHandler h = compiler.metadataCompile(url, alias);
return new DefaultFacelet(this, compiler.createExpressionFactory(), url, alias, h);
} catch (FileNotFoundException fnfe) {
throw new FileNotFoundException("Facelet " + alias + " not found at: " + url.toExternalForm());
}
}
public long getRefreshPeriod() {
return refreshPeriod;
}
// ---------------------------------------------------------- Nested Classes
private static final class IdMapperFactory implements Cache.Factory {
// ------------------------------------------ Methods from Cache.Factory
@Override
public IdMapper newInstance(String arg) throws InterruptedException {
return new IdMapper();
}
}
}